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ooblick magick
We all know that cornstarch + water (otherwise known as ooblick) is amazing stuff. However, these guys in texas at the center for nonlinear dynamics have taken it to a new level. If nothing else, you should check out the paper and definitely the movie. I wonder if this could be repeated just using a loudspeaker and function generator? Yet another reason to procrastinate on studying for finals!
[edit: you're too late! I guess the movie was "slashdotted," as it's no longer available from their web page. )-: edit2: nevermind, they fixed it.]
[edit3: here's an experiment with solitons that you can do on the surface of a pool: Falaco Solitons. Check out the paper gr-qc/0101098 in arXiv. "String theorists take note, for the
structure consists of a pair of topological 2-dimensional rotational defects in a surface of
discontinuity, globally connected and stabilized by a 1 dimensional topological defect or
string."]
On another note, I'm curious how much of antenna theory can be co-opted to make antennas for sound. A yagi for sound seems a bit unlikely, but parabolic reflectors certainly work, and it seems that there ought to be some magic with cavity resonators.
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I suppose you're right. Other suggestions?
Mass-spring suspension system at the resonant frequency? sounds annoying.
I have some old code for producing sound output in linux that might be handy: http://splorg.org/people/tobin/projects/dtmf/
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